Question

A ray from an object kept at some distance is incident on the lens as shown. Where is the image formed, if P'P is the principal axis and A is the focus?

• A. at A
• B. cannot be determined
• C. forms at infinity
• D. At C

Answer 1

The correct option is B cannot be determined

The set of rules for constructing ray diagrams to obtain images are:

• Any ray travelling parallel to the principle axis should pass through focus and vice versa.
• Any ray of light passing through the optic centre should pass without any deviation.
• At least 2 rays of light should intersect each other to plot the position of image.

Here, we dont have 2 incident rays to calculate the position of image.